$OpenBSD: patch-common_exf_h,v 1.1 2016/09/10 13:03:41 ajacoutot Exp $
--- common/exf.h.orig	Sat Sep 10 10:53:06 2016
+++ common/exf.h	Sat Sep 10 10:52:38 2016
@@ -9,6 +9,9 @@
  *	$Id: patch-common_exf_h,v 1.1 2016/09/10 13:03:41 ajacoutot Exp $
  */
 					/* Undo direction. */
+
+#include <sys/select.h> /* timespec */
+
 /*
  * exf --
  *	The file structure.
